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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
| commit | 0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch) | |
| tree | f9d26c8abc0de39d18d4c13e70f6022cdc6b461f /sysdeps/ieee754/ldbl-96/s_asinhl.c | |
| parent | a843a204a3e8a0dd53584dad3668771abaec84ac (diff) | |
| download | glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.gz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.bz2 glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.zip | |
Optimize libm
libm is now somewhat integrated with gcc's -ffinite-math-only option
and lots of the wrapper functions have been optimized.
Diffstat (limited to 'sysdeps/ieee754/ldbl-96/s_asinhl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/s_asinhl.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/sysdeps/ieee754/ldbl-96/s_asinhl.c b/sysdeps/ieee754/ldbl-96/s_asinhl.c index 6eb434c44b..9f37d48842 100644 --- a/sysdeps/ieee754/ldbl-96/s_asinhl.c +++ b/sysdeps/ieee754/ldbl-96/s_asinhl.c @@ -52,19 +52,21 @@ huge= 1.000000000000000000e+4900L; int32_t hx,ix; GET_LDOUBLE_EXP(hx,x); ix = hx&0x7fff; - if(ix==0x7fff) return x+x; /* x is inf or NaN */ - if(ix< 0x3fde) { /* |x|<2**-34 */ + if(__builtin_expect(ix< 0x3fde, 0)) { /* |x|<2**-34 */ if(huge+x>one) return x; /* return x inexact except 0 */ } - if(ix>0x4020) { /* |x| > 2**34 */ + if(__builtin_expect(ix>0x4020,0)) { /* |x| > 2**34 */ + if(ix==0x7fff) return x+x; /* x is inf or NaN */ w = __ieee754_logl(fabsl(x))+ln2; - } else if (ix>0x4000) { /* 2**34 > |x| > 2.0 */ - t = fabsl(x); - w = __ieee754_logl(2.0*t+one/(__ieee754_sqrtl(x*x+one)+t)); - } else { /* 2.0 > |x| > 2**-28 */ - t = x*x; - w =__log1pl(fabsl(x)+t/(one+__ieee754_sqrtl(one+t))); + } else { + long double xa = fabsl(x); + if (ix>0x4000) { /* 2**34 > |x| > 2.0 */ + w = __ieee754_logl(2.0*xa+one/(__ieee754_sqrtl(xa*xa+one)+xa)); + } else { /* 2.0 > |x| > 2**-28 */ + t = xa*xa; + w =__log1pl(xa+t/(one+__ieee754_sqrtl(one+t))); + } } - if(hx&0x8000) return -w; else return w; + return __copysignl(w, x); } weak_alias (__asinhl, asinhl) |